CN112072766A - Charging device - Google Patents
Charging device Download PDFInfo
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- CN112072766A CN112072766A CN202010967249.5A CN202010967249A CN112072766A CN 112072766 A CN112072766 A CN 112072766A CN 202010967249 A CN202010967249 A CN 202010967249A CN 112072766 A CN112072766 A CN 112072766A
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- 239000003990 capacitor Substances 0.000 claims abstract description 124
- 238000001514 detection method Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a charging device, includes: the first capacitor and the second capacitor are electrically connected with the positive output end and the negative output end of the rectification module through the first electronic switch, the second electronic switch and the third electronic switch; when the input voltage of the voltage input end is a first voltage, the logic control module controls the first electronic switch and the second electronic switch to be in a disconnected state and controls the third electronic switch to be in a connected state, so that the first capacitor and the second capacitor are connected in series; when the input voltage of the voltage input end is the second voltage, the logic control module controls the first electronic switch and the second electronic switch to be in a conducting state and controls the third electronic switch to be in a disconnecting state, so that the first capacitor and the second capacitor are connected in parallel. This can effectively reduce the volume of the charging apparatus.
Description
Technical Field
The application relates to the technical field of communication, especially, relate to a battery charging outfit.
Background
With the development of the fast charging technology of electronic devices such as mobile phones, the output power of the charging device is also required to be higher and higher. The filtering electrolytic capacitor required by the high-power supply has large capacity and volume, so that the volume of the charger is also increased. In order to improve the portability of the charging device, the size of the transformer is generally reduced by increasing the operating frequency of the power supply, and finally, the size of the charging device is reduced. However, the increase of the operating frequency of the power supply increases the switching loss of the switching tube, thereby reducing the overall efficiency of the charging device.
Disclosure of Invention
The embodiment of the application provides a charging device to solve the problem that the overall efficiency is low due to the improvement of the working frequency of a power supply of the conventional portable charging device.
In order to solve the above technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging apparatus, including: a rectifier module, a first capacitor, a second capacitor, a first electronic switch, a second electronic switch, a third electronic switch and a logic control module,
the first end of the first capacitor is electrically connected with the positive output end of the rectification module, one end of the first electronic switch is electrically connected with the second end of the first capacitor, and the other end of the first electronic switch is electrically connected with the negative output end of the rectification module;
one end of the second electronic switch is electrically connected with the positive output end, the other end of the second electronic switch is electrically connected with the first end of the second capacitor, and the second end of the second capacitor is electrically connected with the negative output end;
one end of the third electronic switch is electrically connected with the second end of the first capacitor, and the other end of the third electronic switch is electrically connected with the first end of the second capacitor;
the logic control module is respectively and electrically connected with the first electronic switch, the second electronic switch, the third electronic switch and the voltage input end of the charging equipment;
when the input voltage of the voltage input end is a first voltage, the logic control module controls the first electronic switch and the second electronic switch to be in a disconnected state and controls the third electronic switch to be in a connected state, so that the first capacitor and the second capacitor are connected in series;
when the input voltage of the voltage input end is a second voltage, the logic control module controls the first electronic switch and the second electronic switch to be in a conducting state, and controls the third electronic switch to be in a disconnecting state, so that the first capacitor and the second capacitor are connected in parallel.
In the embodiment of the application, the connection state of the first capacitor and the second capacitor is adjusted according to the magnitude of the input voltage of the charging device, and when the input voltage is the first voltage, that is, the input voltage is higher, the logic control module controls the first electronic switch and the second electronic switch to be in the off state and controls the third electronic switch to be in the on state, so that the first capacitor and the second capacitor are connected in series, and the withstand voltage value of the first capacitor and the second capacitor connected in series is improved; when the input capacitor is the second voltage, namely the input voltage is lower, the logic control module controls the first electronic switch and the second electronic switch to be in a conducting state and controls the third electronic switch to be in a disconnecting state, so that the first capacitor and the second capacitor are connected in parallel, the capacity of the first capacitor and the capacity of the second capacitor which are connected in parallel are improved, the small ripple voltage is achieved, and the effect of stable work is achieved. Therefore, by adjusting the connection state of the first capacitor and the second capacitor and enabling the first capacitor and the second capacitor which are connected in series to work to have higher voltage withstanding values when the input voltage is higher, the use of a large-volume electrolytic capacitor with high voltage withstanding and large capacity is avoided, and the purpose of reducing the volume of the charging equipment is achieved.
Drawings
Fig. 1 is a structural diagram of a charging device provided in an embodiment of the present application;
FIG. 2 is a block diagram of an electrolytic capacitor filter module according to an embodiment of the present disclosure;
fig. 3 is a structural diagram of a logic control module according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
As shown in fig. 1, the present embodiment provides a charging device, which includes an external power source 10, an electromagnetic interference filtering module 20, a rectifying module 30, an electrolytic capacitor filtering module 40, a power conversion module 50, an output rectifying and filtering module 60, and an output port 70; the input end of the electromagnetic interference filtering module 20 is electrically connected to the external power source 10, the output end of the electromagnetic interference filtering module 20 is electrically connected to the input end of the rectifying module 30, the input end of the rectifying module 30 is electrically connected to the input end of the power converting module 50 through the electrolytic capacitor module 40, the output end of the power converting module 50 is connected to the input end of the output rectifying and filtering module 60, and the output end of the output rectifying and filtering module 60 is electrically connected to the output port 70.
The external power source may be a power grid or other electric energy storage devices, and the electromagnetic interference filtering module 20 is configured to filter electromagnetic signals in the external power source 10; the rectifier module 30 is used for converting alternating current into direct current; the output port 70 may be used to connect with a device to be charged for charging or supplying power to the device to be charged.
An embodiment of the present application provides a charging apparatus, including: a rectifying module, a first capacitor 41, a second capacitor 42, a first electronic switch 43, a second electronic switch 44, a third electronic switch 45 and a logic control module, wherein,
a first end of the first capacitor 41 is electrically connected with a positive output end of the rectification module, one end of the first electronic switch 43 is electrically connected with a second end of the first capacitor 41, and the other end of the first electronic switch 43 is electrically connected with a negative output end of the rectification module;
one end of the second electronic switch 44 is electrically connected to the positive output end, the other end is electrically connected to the first end of the second capacitor 42, and the second end of the second capacitor 42 is electrically connected to the negative output end;
one end of the third electronic switch 45 is electrically connected to the second end of the first capacitor 41, and the other end is electrically connected to the first end of the second capacitor 42;
the logic control module is respectively electrically connected with the first electronic switch 43, the second electronic switch 44, the third electronic switch 45 and the voltage input end of the charging device;
when the input voltage of the voltage input end is the first voltage, the logic control module controls the first electronic switch 43 and the second electronic switch 44 to be in a disconnected state, and controls the third electronic switch 45 to be in a connected state, so that the first capacitor and the second capacitor are connected in series;
when the input voltage at the voltage input terminal is the second voltage, the logic control module controls the first electronic switch 43 and the second electronic switch 44 to be in the on state, and controls the third electronic switch 45 to be in the off state, so that the first capacitor and the second capacitor are connected in parallel.
The first capacitor 41, the second capacitor 42, the first electronic switch 43, the second electronic switch 44, the third electronic switch 45 and the logic control module may form the above-mentioned electrolytic capacitor filtering module 40.
Moreover, in the present embodiment, by adjusting the connection state of the first capacitor 41 and the second capacitor 42 according to the magnitude of the input voltage of the charging device, and when the input voltage is the first voltage, that is, the input voltage is higher, the logic control module controls the first electronic switch 43 and the second electronic switch 44 to be in the off state, and controls the third electronic switch 45 to be in the on state, so that the first capacitor 41 and the second capacitor 42 are connected in series, so as to increase the withstand voltage value of the first capacitor 41 and the second capacitor 42 connected in series; when the input capacitor is the second voltage, that is, the input voltage is lower, the logic control module controls the first electronic switch 43 and the second electronic switch 44 to be in the on state, and controls the third electronic switch 45 to be in the off state, so that the first capacitor 41 and the second capacitor 42 are connected in parallel, the capacity of the first capacitor 41 and the second capacitor 42 connected in parallel is improved, the small ripple voltage is achieved, and the effect of stable operation is achieved. By adjusting the connection state of the first capacitor 41 and the second capacitor 42 and enabling the first capacitor 41 and the second capacitor 42 connected in series to work with a higher withstand voltage value when the input voltage is higher, the use of a large-volume electrolytic capacitor with high withstand voltage and large capacity is avoided, and the purpose of reducing the volume of the charging equipment is achieved.
The first voltage is greater than the second voltage, and when the first capacitor 41 and the second capacitor 42 are connected in series, the voltage endurance of the electrolytic capacitor filter module 40 can be improved, so that the electrolytic capacitor filter module 40 is prevented from being damaged by high input voltage, and the effect of high reliability is achieved; when the first capacitor 41 and the second capacitor 42 are connected in parallel, the capacity of the electrolytic capacitor filter module 40 can be increased, and a small ripple voltage can be achieved, thereby achieving the effect of stable operation.
Specifically, when the input voltage is a first voltage, i.e., a high voltage, the logic control module 46 controls the first electronic switch 43 and the second electronic switch 44 to be in an off state, and controls the third electronic switch 45 to be in an on state, so that the first capacitor 41 and the second capacitor 42 are connected in series, and thus the withstand voltage value of the electrolytic capacitor filter module 40 in the high voltage state is increased, the electrolytic capacitor filter module 40 is prevented from being damaged in the high input voltage state, and the effect of high reliability is achieved;
correspondingly, when the input voltage is the second voltage, i.e. the low voltage, the logic control module 46 controls the first electronic switch 43 and the second electronic switch 44 to be in the on state, and controls the third electronic switch 45 to be in the off state, so that the first capacitor 41 and the second capacitor 42 are connected in parallel, thereby increasing the capacity of the electrolytic capacitor filter module 40, achieving a small ripple voltage, and achieving an effect of stable operation.
Alternatively, the number of capacitors in the electrolytic capacitor filter module 40 may be N; and when the charging device starts to work, the N capacitors in the electrolytic capacitor filtering module 40 may be connected in parallel by default. And if the voltage is too high, controlling the N capacitors to be connected in series in the process of voltage rise.
For example, when the charging device starts to operate, the input voltage may be detected by the logic control module 46; when the input voltage is low, the logic control module 46 controls the N capacitors to be connected in parallel, so that the capacities of the N capacitors are increased, and the requirement of the minimum working voltage of the voltage ripple of the charging equipment at low voltage is met; when the input voltage is high, the logic control module 46 controls the N capacitors to be connected in series, so that the withstand voltage of the N capacitors is increased. It should be noted that, when the input voltage is higher, the minimum voltage is greater than the minimum operating voltage at which the charging device operates.
As shown in fig. 3, the logic control module 46 includes a voltage detection unit 461, a comparator 462, a logic control unit 463, and a driving unit 464, and further includes a first resistor 465, a second resistor 466, and a power supply unit 467; wherein:
the voltage detection unit 461 is electrically connected to an input terminal of the comparator 462 for detecting an input voltage of the charging device;
one end of the logic control unit 463 is electrically connected to the output end of the comparator 462, the other end is electrically connected to the first end of the driving unit 464, and the second end of the driving voltage 464 is electrically connected to the first electronic switch 43, the second electronic switch 44 and the third electronic switch 45, respectively;
the logic control unit 463 is configured to control the driving unit 464 to adjust the operating states of the first electronic switch 43, the second electronic switch 44, and the third electronic switch 45 according to the detected input voltage, so as to switch the first capacitor 41 and the second capacitor 42 between the series connection and the parallel connection.
The logic control unit 463 may control the driving unit 464 to output a corresponding driving signal according to the signal of the comparator 462 by comparing with a preset logic, for example, the driving unit 464 may be controlled to adjust the operating states of the first electronic switch 43, the second electronic switch 44, and the third electronic switch 45, so as to switch the first capacitor 41 and the second capacitor 42 between the series connection and the parallel connection.
One end of the first resistor 465 may be electrically connected to the positive output end of the rectifying module 30, and the other end of the first resistor 465 is electrically connected to the first end of the voltage detecting unit 461, and the input end of the comparator 462 electrically connected to the voltage detecting unit 461 is the first input end of the comparator 462;
the comparator 462 further includes a second input end electrically connected to the output end of the reference voltage module, the output end of the comparator 462 is electrically connected to the first end of the logic control unit 463, the comparator 462 is configured to compare the voltage detected by the voltage detection unit 461 with the voltage output by the reference voltage module, so that the logic control unit 463 outputs a control instruction to the driving unit 464 according to the comparison result, and further adjusts the operating states of the first electronic switch 43, the second electronic switch 44 and the third electronic switch 45 through the driving unit 464, so as to switch the first capacitor 41 and the second capacitor 42 between the series connection and the parallel connection;
one end of the second resistor 466 may also be electrically connected to the positive output end of the rectifying module 30, the other end of the second resistor 466 is electrically connected to the first end of the power supply unit 467, the second end of the power supply unit 467 is electrically connected to the first end of the logic control unit 463, and the power supply unit 467 is configured to supply power to the logic control module 46.
In the process of charging equipment, alternating current is input from an external power supply 10 through an electromagnetic interference filtering module 20, and the alternating current is converted into direct current after passing through a rectifying module 30; the power rectified by the rectifying module 30 is firstly supplied to the logic control module 46, and at this time, the first capacitor 41 and the second capacitor 42 are both in the off state.
After the logic control module 46 is powered on, the first electronic switch 43 and the second electronic switch 44 are controlled to be in the on state, and the third electronic switch 45 is controlled to be in the off state, and simultaneously, the input voltage of the charging device is detected. At this time, the first capacitor 41 and the second capacitor 42 are connected in parallel, and the rectified power charges the first capacitor 41 and the second capacitor 42.
When the logic control module 46 detects that the input voltage is higher than the threshold V1, the value of V1 may range from 150 volts to 200 volts; the logic control module 46 controls the first electronic switch 43 and the second electronic switch 44 to be in an off state and the third electronic switch 45 to be in an on state even though the first capacitor 41 and the second capacitor 42 are connected in series.
When the logic control module 46 detects that the input voltage is below the threshold V2, V2 is 30-70 volts less than V1; the logic control module 46 controls the first electronic switch 43 and the third electronic switch 45 to be in a conducting state, and the second electronic switch 44 to be in a disconnecting state, even though the first capacitor 41 and the second capacitor 42 are connected in parallel.
The logic control module 46 may further include an isolation unit 468, where one end of the isolation unit 468 is electrically connected to the driving unit 464, and the other end of the isolation unit 468 is electrically connected to the first electronic switch 43, so as to solve the problem that the signals of the first electronic switch 43 are not grounded together.
The logic control module 46 may further include a not-gate unit 469, wherein one end of the not-gate unit 469 is electrically connected to the driving unit 464, and the other end is electrically connected to the third electronic switch 45; delay time and dead time may be reduced by providing not gate unit 469. For example, when the logic control module 46 controls the first electronic switch 43 and the second electronic switch 44 to be in the off state, the delay time of the not gate unit 469 is delayed to make the third electronic switch 45 be in the on state, so as to reduce the delay time; when the logic control module 46 controls the first electronic switch 43 and the second electronic switch 44 to be in the conducting state and the third electronic switch 45 to be in the off state, the dead time can be reduced by delaying the time of the not gate unit 469.
The charging device may further include a first diode and a second diode, an anode of the first diode is electrically connected to the positive input terminal of the rectifying module 30, an anode of the second diode is electrically connected to the negative input terminal of the rectifying module 30, and a cathode of the first diode and a cathode of the second diode are electrically connected to the voltage detecting unit 461.
The voltage detection unit may be electrically connected to the positive output terminal of the rectifier module 30 to detect the input voltage.
The first electronic switch 43, the second electronic switch 44 and the third electronic switch 45 may be MOS switches, relay switches, or the like.
It should be noted that when the N capacitors include three capacitors, when the input voltage is lower, the electrolytic capacitor filtering module 40 has a larger capacitor capacity, and the output ripple of the charging device is better; meanwhile, the charging equipment can bear higher input voltage, and the reliability of the charging equipment is ensured.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A charging device, comprising: a rectifier module, a first capacitor, a second capacitor, a first electronic switch, a second electronic switch, a third electronic switch and a logic control module,
the first end of the first capacitor is electrically connected with the positive output end of the rectification module, one end of the first electronic switch is electrically connected with the second end of the first capacitor, and the other end of the first electronic switch is electrically connected with the negative output end of the rectification module;
one end of the second electronic switch is electrically connected with the positive output end, the other end of the second electronic switch is electrically connected with the first end of the second capacitor, and the second end of the second capacitor is electrically connected with the negative output end;
one end of the third electronic switch is electrically connected with the second end of the first capacitor, and the other end of the third electronic switch is electrically connected with the first end of the second capacitor;
the logic control module is respectively and electrically connected with the first electronic switch, the second electronic switch, the third electronic switch and the voltage input end of the charging equipment;
when the input voltage of the voltage input end is a first voltage, the logic control module controls the first electronic switch and the second electronic switch to be in a disconnected state and controls the third electronic switch to be in a connected state, so that the first capacitor and the second capacitor are connected in series;
when the input voltage of the voltage input end is a second voltage, the logic control module controls the first electronic switch and the second electronic switch to be in a conducting state, and controls the third electronic switch to be in a disconnecting state, so that the first capacitor and the second capacitor are connected in parallel.
2. The charging apparatus according to claim 1, wherein the logic control module includes a voltage detection unit, a comparator, a logic control unit, and a driving unit, wherein,
the voltage detection unit is electrically connected with the input end of the comparator and is used for detecting the input voltage of the voltage input end;
one end of the logic control unit is electrically connected with the output end of the comparator, the other end of the logic control unit is electrically connected with the first end of the driving unit, and the second end of the driving unit is electrically connected with the first electronic switch, the second electronic switch and the third electronic switch respectively;
the logic control unit is used for controlling the driving unit to adjust the working states of the first electronic switch, the second electronic switch and the third electronic switch according to the input voltage.
3. The charging apparatus according to claim 2, further comprising a first diode and a second diode;
the anode of the first diode is electrically connected with the positive input end of the rectification module, the anode of the second diode is electrically connected with the negative input end of the rectification module, and the cathode of the first diode and the cathode of the second diode are electrically connected with the voltage detection unit.
4. The charging apparatus according to claim 2, wherein the voltage detection unit is electrically connected to the positive output terminal to detect the input voltage.
5. The charging device according to claim 2, wherein the logic control module further comprises an isolation unit, one end of the isolation unit is electrically connected with the second end of the driving unit, and the other end of the isolation unit is electrically connected with the first electronic switch.
6. The charging device according to claim 2, wherein the logic control module further comprises a not gate unit, one end of the not gate unit is electrically connected with the second end of the driving unit, and the other end of the not gate unit is electrically connected with the second electronic switch.
7. The charging apparatus according to any one of claims 1 to 6, wherein the first voltage is greater than the second voltage.
8. The charging apparatus according to claim 7, wherein a voltage value of the first voltage ranges from 150 volts to 200 volts.
9. The charging apparatus according to claim 8, wherein a voltage value of the second voltage is 30 to 70 volts smaller than a voltage value of the first voltage.
10. The charging apparatus according to any one of claims 1 to 6, wherein the first electronic switch, the second electronic switch, and the third electronic switch are MOS transistors.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010967249.5A CN112072766A (en) | 2020-09-15 | 2020-09-15 | Charging device |
| PCT/CN2021/117976 WO2022057762A1 (en) | 2020-09-15 | 2021-09-13 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010967249.5A CN112072766A (en) | 2020-09-15 | 2020-09-15 | Charging device |
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| CN112072766A true CN112072766A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010967249.5A Pending CN112072766A (en) | 2020-09-15 | 2020-09-15 | Charging device |
Country Status (2)
| Country | Link |
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| CN (1) | CN112072766A (en) |
| WO (1) | WO2022057762A1 (en) |
Cited By (4)
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| CN112787501A (en) * | 2021-01-28 | 2021-05-11 | 维沃移动通信有限公司 | Charging device and electronic apparatus |
| CN112953189A (en) * | 2021-04-16 | 2021-06-11 | 维沃移动通信有限公司 | Charging device |
| CN113972721A (en) * | 2021-10-29 | 2022-01-25 | 维沃移动通信有限公司 | Wireless charging circuit, method, device, electronic equipment and storage medium |
| WO2022057762A1 (en) * | 2020-09-15 | 2022-03-24 | 维沃移动通信有限公司 | Charging device |
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| US10027223B1 (en) * | 2017-06-12 | 2018-07-17 | Linear Technology Holding Llc | Soft-charging of switched capacitors in power converter circuits |
| CN110149041A (en) * | 2019-05-24 | 2019-08-20 | 西安特锐德智能充电科技有限公司 | A kind of serial and parallel switching circuit and its control method |
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| EP3706283B1 (en) * | 2018-12-21 | 2023-05-24 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for charging multiple battery cells, medium and electronic device |
| CN112072766A (en) * | 2020-09-15 | 2020-12-11 | 维沃移动通信有限公司 | Charging device |
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2020
- 2020-09-15 CN CN202010967249.5A patent/CN112072766A/en active Pending
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2021
- 2021-09-13 WO PCT/CN2021/117976 patent/WO2022057762A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10027223B1 (en) * | 2017-06-12 | 2018-07-17 | Linear Technology Holding Llc | Soft-charging of switched capacitors in power converter circuits |
| CN110149041A (en) * | 2019-05-24 | 2019-08-20 | 西安特锐德智能充电科技有限公司 | A kind of serial and parallel switching circuit and its control method |
| CN111404363A (en) * | 2020-02-26 | 2020-07-10 | 华为技术有限公司 | Capacitor series-parallel switching circuit and electronic system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022057762A1 (en) * | 2020-09-15 | 2022-03-24 | 维沃移动通信有限公司 | Charging device |
| CN112787501A (en) * | 2021-01-28 | 2021-05-11 | 维沃移动通信有限公司 | Charging device and electronic apparatus |
| CN112787501B (en) * | 2021-01-28 | 2022-05-24 | 维沃移动通信有限公司 | Charging device and electronic apparatus |
| WO2022161354A1 (en) * | 2021-01-28 | 2022-08-04 | 维沃移动通信有限公司 | Charging apparatus and electronic device |
| CN112953189A (en) * | 2021-04-16 | 2021-06-11 | 维沃移动通信有限公司 | Charging device |
| WO2022218255A1 (en) * | 2021-04-16 | 2022-10-20 | 维沃移动通信有限公司 | Charging apparatus |
| CN112953189B (en) * | 2021-04-16 | 2023-06-20 | 维沃移动通信有限公司 | Charging device |
| CN113972721A (en) * | 2021-10-29 | 2022-01-25 | 维沃移动通信有限公司 | Wireless charging circuit, method, device, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022057762A1 (en) | 2022-03-24 |
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Application publication date: 20201211 |